This refers to a type of recruitment conducted by recruitment agencies for companies. Within contingency recruiting, recruitment agencies carry out talent searches and only get paid if the candidate is successfully hired by the client (the organization). 

Why contingency recruiting is helpful for employers

Contingency Recruiting, is a great way for employers to achieve their goals with the right workforce. Most contingent employees are experienced and with a certain level of expertise; employers also benefit from contingent recruitment by not having to cover employee costs as they would in the traditional way of recruiting. 

It also helps employers to focus on other parts of the organization.